Elisha ezra ells



E. E. ELLS.

STEAM BOILER.

(No Model.)

Patented Sept. 29,4885.

UNITED STATES PATENT FFICE.

ELISHA EZRA ELLS, OF CANNING P. O., NOVA SCOTIA, CANADA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 326,960, datedSeptember 29,1885.

Application filed April l5, 1855. (No model.) Patented in CanadaFebruary 25, 1885, No. 21,140.

To ftZZ who/1t t 71mg/ concern.

Be it known that I, ELIsHA EZRA ELLs. of the township of Cornwallis,(Canning post.- ot'tice,) in the county ot' Kings, in the Province ofNova Scotia, in the Dominion of Canada, have invented certain new anduseful Improveintns in Steam Bolers; and I do hereby declare that thefollowing is a full. clear, and exact description of the same, referencebeing had to the annexed drawings, in which- Figure l is a longitudinalvertical section of a locomotive-boiler with steam-jacket. showingmanner of application, and feedwater coil, shown in dotted lines. Fig. 2is a transverse vertical section ot' thesaine on line xx. Fig. 1.

My invention has for its object to utilize the exhaust-steam fromaboiler to heat the exterior, for economizing fuel, also to heat thefeed-water before'cntering the boiler; and it consists of a sheet-metalsteam-jacket encircling the boiler, the dome, and a portion of thesmoke-stack, to surround the saine with steam for imparting heat fromthe exterior and collect the water of condensation for reuse.

A is a steam-boiler, of any type now in use; B, the steam-dome, and Cthe smoke-stack.

C' is a jacket, ot boiler-plate, encircling the boiler, the dome, andthe smoke-stack. The jacket is'stopped at the ends by iianged plates D,riveted to the boiler, dome, and smokestack, whereby a steam-tightannular space, A', prevails around the boiler and the dome and up thesmoke-stack to a suitable distance. Thejacket C' is secured by knees F,riveted to the boiler, and by screws G to the knees, which are arrangedin alignment at suitable distances apart around .the boiler. The jacketis in two sections, consisting of upper and lower halves, whereby onesection may be removed independently to effect repairs. The two sectionsoverlap at the meeting edges and are connected by screws H.

I is a pipe, connecting with the exhaust of the steam-cylinder` to inletthe steam to the siace A' intervening the jacket and boiler. l`hesmoke-stack has perforations A2, to allow steam to pass from the space Aunder pressure of the inlet steam.

J is a pipe to carry off the water of condensation from the space A' toa tank for reuse.

K is a coil-pipe within the space A', and connects the tank with theboiler, and feeds water to the boiler after being heated by the steamwithin the space A'. A portion of the coil passes outside the jacket C,and is provided with a valve, K', to shut off the feedwater whendesired.

L is asmoke-box connecting with the smokestack.

M are blocks inserted between the boiler' and jacket to resist theweight of the boiler on the jacket when placed on pedestals N,supporting the boiler in position.

I claim as my invention- The combination, Awith asteam-boiler andsmoke-stack C` having perforations A2, of the upper and lowerjacket-sections, bolted together and to knees F, the lower sectionprovided with steam-inlet I and water-outlet J, whereby steam admittedto the space A circulates under pressure around the boiler and passesinto the smoke-stack, as set forth.

ELISHA EZRA ELLS.

Witnesses:

WATsoN W. ELLs, C. R. DICKER.

